Coin bank



FIG. 1 is a perspective view of the front, top and right side of a coin bank embodying the ornamental design of this invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof with the left side view being reversed thereto;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevation thereof.

The broken line showing of the soda can in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a coin bank, as shown and described. 